python中的绘图问题

当我运行代码时，绘图仅显示在点x=4处。我希望它能在整个间歇期内出现

from math import exp, pi, sin
import matplotlib.pyplot as plt
for x in range(-4,5):
    f = (exp(-1*(x)**2))*sin(3*pi*(x))
    print(x,"\t", f)
plt.plot(x,f, 'ro', markersize=1)
plt.show()

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必须在列表中累积值才能绘制它们：

from math import exp, pi, sin
import matplotlib.pyplot as plt

xs = []
ys = []
for x in range(-4,5):   # or range(-4, 6) if you need to plot a value for 5
    f = (exp(-1*(x)**2))*sin(3*pi*(x))
    print(x,"\t", f)
    xs.append(x)
    ys.append(f)
plt.plot(xs, ys, 'ro', markersize=1)
plt.show()

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您只存储一个值。将值存储在列表中。范围不包括最后一个元素。